20216280021

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^2\times {\mathrm{520649}}^1$

素因数の和:520745

約数の個数: 24

約数和(自身を含む): 31538894400

約数和(自身を除く): 11322614379

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 1849, 5547, 12943, 38829, 520649, 1561947, 3644543, 10933629, 22387907, 67163721, 156715349, 470146047, 962680001, 2888040003, 6738760007, 20216280021]

約数ペア:

[(1, 20216280021), (3, 6738760007), (7, 2888040003), (21, 962680001), (43, 470146047), (129, 156715349), (301, 67163721), (903, 22387907), (1849, 10933629), (5547, 3644543), (12943, 1561947), (38829, 520649)]